US20170055817A1 - Endoscope Illumination System And Method For Shadow Creation And Improved Depth Perception And Edge Detection - Google Patents

Endoscope Illumination System And Method For Shadow Creation And Improved Depth Perception And Edge Detection Download PDF

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Publication number
US20170055817A1
US20170055817A1 US15/121,969 US201515121969A US2017055817A1 US 20170055817 A1 US20170055817 A1 US 20170055817A1 US 201515121969 A US201515121969 A US 201515121969A US 2017055817 A1 US2017055817 A1 US 2017055817A1
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Prior art keywords
illumination
light
endoscope
activating
illumination member
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Abandoned
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US15/121,969
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English (en)
Inventor
Maciej Dybiec
Peter Pal Bodor
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Intergrated Medical Systems International Inc
Steris Instrument Management Services Inc
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Intergrated Medical Systems International Inc
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Priority to US15/121,969 priority Critical patent/US20170055817A1/en
Publication of US20170055817A1 publication Critical patent/US20170055817A1/en
Assigned to STERIS INSTRUMENT MANAGEMENT SERVICES, INC. reassignment STERIS INSTRUMENT MANAGEMENT SERVICES, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: Integrated Medical Systems International, Inc.
Assigned to Integrated Medical Systems International, Inc. reassignment Integrated Medical Systems International, Inc. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BODOR, PETER PAL, DYBIEC, Maciej
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0605—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements for spatially modulated illumination
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00002—Operational features of endoscopes
    • A61B1/00004—Operational features of endoscopes characterised by electronic signal processing
    • A61B1/00006—Operational features of endoscopes characterised by electronic signal processing of control signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00096—Optical elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/043—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances for fluorescence imaging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0607—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements for annular illumination
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0655—Control therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres

Definitions

  • the present invention is directed to an endoscope illumination system and method of using same. More particularly, the present invention is directed to a directional illumination system for use with an endoscope for creating shadows in an object field for improving depth perception and contrast.
  • Artificial shadow creation methods exist in the field of optics. For example, artificial shadow creation is used in metrology to measure depth and in machine vision applications.
  • an endoscope illumination system including an endoscope distal tip including a plurality of light ports and a plurality of illumination or optical fibers extending longitudinally within the endoscope distal tip and arranged to direct light through the plurality of light ports onto an object field.
  • At least one light source is operatively coupled to the plurality of illumination fibers for supplying light to the illumination fibers.
  • a switching mechanism is operatively coupled to the plurality of illumination fibers and the at least one light source for selectively delivering light to the illumination fibers.
  • the switching mechanism is configured for activating a first set of illumination fibers that are arranged to direct light through one or more light ports of the plurality of light ports while refraining from activating a second set of illumination fibers, the second set of illumination fibers being arranged to direct light though at least one light port of the plurality of light ports.
  • the first set of illumination fibers can include a first illumination fiber bundle arranged to direct light through a first light port in the distal tip, a second illumination fiber bundle arranged to direct light through a second light port in the distal tip and a third illumination fiber bundle arranged to direct light through a third light port in the distal tip.
  • the second set of illumination fibers can include a fourth illumination fiber bundle arranged to direct light through a fourth light port in the distal tip.
  • the first illumination fiber bundle, the second illumination fiber bundle, the third illumination fiber bundle and the fourth illumination fiber bundle are each independently activatable. This can be accomplished by providing the switching mechanism with a switch for each of the first, second, third and fourth illumination fiber bundles.
  • a front end of the endoscope distal tip is faced towards an object to be illuminated and a shadow is created that extends from the object by activating the first set of illumination fibers without activating the second set of illumination fibers. Creation of the shadow improves a user's depth perception within the object field.
  • the endoscope illumination system can also be used to improve edge detection of an area of stained biological tissue by facing a front end of the endoscope distal tip towards the area of stained tissue and activating the first set of illumination fibers without activating the second set of illumination fibers. Thereafter, the second set of illumination fibers is activated without activating the first set of illumination fibers.
  • the at least one light source may emits visual spectrum light or non-visual spectrum light.
  • an endoscope illumination system including an endoscope distal tip including a first light port and a second light port, a first illumination member within the endoscope distal tip that is arranged to direct light through the first light port onto an object field and a second illumination member within the endoscope distal tip that is arranged to direct light through the second light port onto the object field.
  • At least one light source is operatively coupled to the first illumination member and the second illumination member for providing light that can be transmitted by the illumination members.
  • the light source may include a visual spectrum light source, a non-visual spectrum light source or both the visual spectrum light source and the non-visual spectrum light source
  • a switching mechanism operatively coupled to the first illumination member, the second illumination member and the at least one light source is provided which includes a first switch adapted and arranged to selectively activate and deactivate the first illumination member and a second switch adapted and arranged to selectively activate and deactivate the second illumination member independently of activation of the first illumination member by the first switch.
  • the endoscope illumination system can include a third light port, a third illumination member within the endoscope distal tip that is arranged to direct light through the third light port onto the object field, a fourth light port and a fourth illumination member within the endoscope distal tip that is arranged to direct light through the fourth light port onto the object field.
  • the switching mechanism can include third switch and a fourth switch that are adapted and arranged to selectively activate and deactivate the third and fourth illumination members, respectively, independently of activation of the first illumination member by the first switch.
  • a method of using an endoscope including providing an endoscope including an endoscope illumination system having a plurality of selectively activatable illumination members, the plurality of selectively activatable illumination members being arranged within a distal tip of the endoscope to direct light onto an object field, and activating a first selectively activatable illumination member of the plurality of selectively activatable illumination members without activating a second selectively activatable illumination member of the plurality of selectively activatable illumination members.
  • activating the first selectively activatable illumination member without activating the second selectively activatable illumination member improves detection of an edge of the area of stained biological tissue in the object field. Edge detection is further improved by activating the second selectively activatable illumination member without activating the first selectively activatable illumination member. Improvement in edge detection comes from direct comparison/overlay of two (first and second selectively activatable illumination) obtained images where the only common feature should be the edge.
  • FIG. 1 is a perspective view of a front end of an endoscope distal tip in accordance with the present invention displaying multiple light ports for controlled directional illumination.
  • FIG. 2 is a perspective view of a front end of an endoscope distal tip in accordance with the present invention displaying fiber optic bundles located within the multiple light ports.
  • FIG. 3 is an elevational view of the front end of the endoscope distal tip of FIG. 1 with schematic drawings illustrating independently activated switch mechanisms and power sources for selectively powering directional illumination bundles that are associated with the lights ports.
  • FIG. 4A is a perspective view of the endoscope distal tip of FIG. 1 illustrating directional illumination and shadow creation within an object field by selectively powering light bundles to create a leftward extending shadow.
  • FIG. 4B is a perspective view of the endoscope distal tip of FIG. 1 illustrating directional illumination and shadow creation within an object field by selectively powering light bundles to create a rightward extending shadow.
  • FIG. 5A is a perspective view of the endoscope distal tip of FIG. 1 illustrating directional illumination and shadow creation within an object field by selectively powering light bundles to create a shadow and expose features that are not visible in direct illumination.
  • FIG. 5B is a perspective view of the endoscope distal tip of FIG. 1 illustrating directional illumination and shadow creation within an object field by selectively powering light bundles to create a extending shadow.
  • FIG. 6A is a perspective view of the endoscope distal tip of FIG. 1 illustrating directional illumination within an object field by selectively powering light bundles for enhanced edge detection between a stained area and a non-stained area.
  • FIG. 6B is a perspective view of the endoscope distal tip of FIG. 1 illustrating directional illumination within an object field by selectively powering light bundles for enhanced edge detection between a stained area and a non-stained area.
  • the present invention is directed to a directional illumination system for creating shadows in an object field for improving depth perception and contrast.
  • Directional illumination is based on the ability to control a light source in a manner that illuminates an object from a predetermined direction, e.g., from a first lateral side, a second lateral side, a top side or a bottom side, in order to create well-defined shadows. Doing so enhances a user's depth perception within the object field.
  • directional illumination is accomplished by providing multiple light ports that contain respective optical fiber bundles that are connected with respective light sources that can be switched on/off independently, arranging the light ports so that light from the optical fiber bundles strikes an object in an object field at different angles and activating all but at least one of the optical fiber bundles.
  • Directional illumination can also be accomplished by providing a whole circular light bundle that is divided into sections that can be switched on/off independently.
  • the directional illumination system of the present invention can be used to improve zone differentiation in fluorescence imaging techniques. Delivering light to fluorescent dyes from different angles using the present invention can improve accurate border analysis and detection of stained areas vs. unstained areas in the object field.
  • the primary filed of application of the directional illumination system of the present invention is endoscopy.
  • Controlled shadow creation can be used in endoscopy to enhance depth perception of three dimensional objects in the object field. Improved depth perception is desired in endoscopy since objects observed through an endoscope typically provide poor depth perception since they can only be observed from the front of the object with very little space between the distal end of the endoscope and object.
  • the present invention is applicable in the imaging of complex surface morphologies where direct frontal illumination, as is currently provided in endoscopy field, might not reveal all the necessary detail. Further, the present invention can improve contrast where surfaces in the object field are shiny and/or reflective by adding or enhancing shadows which expose contours that might not be visible in uniform frontal illumination.
  • Distal tip 10 includes a continuous outer wall 12 , a continuous inner wall 14 and a primary channel 14 defined by inner wall 14 .
  • Primary channel 15 is typically used to extend surgical instruments through the endoscope and into an object field.
  • Extending between outer wall 12 and inner wall 14 are four illumination channels 16 , 18 , 20 and 22 that extend longitudinally through distal tip 10 and open through a front face 24 of the distal tip at respective light ports 26 , 28 , 30 and 32 .
  • Illumination channels are sealed from one another by ribs 34 , 36 , 38 and 40 and arranged equidistantly around front face 24 .
  • a plurality of optical fibers extends longitudinally through distal tip 10 .
  • the optical fibers are divided into four optical fiber bundles 42 , 44 , 46 and 48 which extend through respective illumination channels 16 , 18 , 20 and 22 .
  • Optical fiber bundles 42 , 44 , 46 and 48 are arranged within respective illumination channels 16 , 18 , 20 and 22 to direct light through respective light ports 26 , 28 , 30 and 32 and front face 24 of distal tip 10 onto an object field.
  • the placement of light ports 26 , 28 , 30 and 32 around front face 24 ensures that light emitted by optical fiber bundles 42 , 44 , 46 and 48 strikes objects with the object field from different angles.
  • optical fiber bundles 42 , 44 , 46 and 48 receive light from independently controllable light sources 50 , 52 , 54 and 56 which allows light to be selectively transmitted to and through each of optical fiber bundles 42 , 44 , 46 and 48 .
  • Each of light sources 50 , 52 , 54 and 56 includes a power source 58 , an independently actuatable switch 60 and a light generator 62 .
  • light generator 62 may generate light in the visual spectrum or the non-visual spectrum. In certain instances, it may be beneficial that some of light sources 50 , 52 , 54 and 56 emit light in the visual spectrum, while other others emit light in the non-visual spectrum.
  • the present invention may rely upon a single light generator in combination with a light splitter, e.g., one or more prisms, and set of shutters for selectively blocking the transmission of light from the single light generator to the optical fiber bundles.
  • a light splitter e.g., one or more prisms, and set of shutters for selectively blocking the transmission of light from the single light generator to the optical fiber bundles.
  • FIGS. 4A and 4B there is depicted a method of utilizing a directional illumination system to create shadows in accordance with a first embodiment of the present invention.
  • the method includes providing an endoscope including distal tip 10 with optical fiber bundles 42 , 44 , 46 and 48 operatively coupled to independently controllable light sources 50 , 52 , 54 and 56 , directing front face 24 of the distal tip toward an object 64 to be illuminated and activating three or less of light generators 62 to thereby emit light from three or less of light ports 26 , 28 , 30 and 32 .
  • FIG. 4A light is emitted from a single light port 28 , while no light is emitted by light ports, 26 , 30 and 32 .
  • FIGS. 5A and 5B there is depicted a method of utilizing a directional illumination system to reveal morphology features that are easily detectable in shadow envelopes in accordance with the present invention.
  • the method includes providing an endoscope including distal tip 10 with optical fiber bundles 42 , 44 , 46 and 48 operatively coupled to independently controllable light sources 50 , 52 , 54 and 56 , directing front face 24 of the distal tip toward an object 64 to be illuminated and activating three or less of light generators 62 to thereby emit light from three or less of light ports 26 , 28 , 30 and 32 .
  • an endoscope including distal tip 10 with optical fiber bundles 42 , 44 , 46 and 48 operatively coupled to independently controllable light sources 50 , 52 , 54 and 56 , directing front face 24 of the distal tip toward an object 64 to be illuminated and activating three or less of light generators 62 to thereby emit light from three or less of light ports 26 , 28 , 30 and 32 .
  • light is emitted from a single light port 32 , while no light is emitted by light port 26 , 28 and 30 .
  • a shadow 66 is cast that extends rightward from object 64 .
  • the existence of shadows 66 adds perspective to the image of object and imparts improved depth perception to the user.
  • Perspective and depth perception are further improved by independently activating other light sources 50 , 52 and 54 to form shadows that extend leftward, as depicted in FIG. 5B , upward by activating light source 54 only or downward by activating only light source 50 only.
  • FIGS. 6A and 6B there is depicted a method of utilizing a directional illumination system to improve edge detection of a stained biological tissue within an object field in accordance with the present invention.
  • the method includes providing an endoscope including distal tip 10 with optical fiber bundles 42 , 44 , 46 and 48 operatively coupled to independently controllable light sources 50 , 52 , 54 and 56 , directing front face 24 of the distal tip toward a specimen including a biological tissue that includes a stained portion 74 and an unstained portion 76 and activating three or less of light generators 62 to thereby propagate light from three or less of light ports 26 , 28 , 30 and 32 .
  • edge 78 can be observed between the stained portion 74 , which emits light due to fluorescence, and the unstained portion 76 , which emits little to no light. Additionally, depending on the surface morphology, shadows may be cast adding to the user's depth perception in the object field. Detection and analysis of the of edge 78 is improved by independently activating light source 52 , which directs light at edge 78 from different angle than the light emitted from light source 66 .
  • independent light ports 26 , 28 , 30 and 32 it is possible to create and/or force shadows in one predefined direction that allows for better surface morphology assessment. If a shadow in an expected predefined direction cannot be found, sequential scan with all light ports and consecutive image analysis can be used to determine in what direction surface features are oriented. Analysis of all shadow patterns from sequential illumination provides additional information about feature orientation with respect to the tip of endoscope.

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US15/121,969 2014-02-20 2015-02-19 Endoscope Illumination System And Method For Shadow Creation And Improved Depth Perception And Edge Detection Abandoned US20170055817A1 (en)

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US201461942454P 2014-02-20 2014-02-20
US15/121,969 US20170055817A1 (en) 2014-02-20 2015-02-19 Endoscope Illumination System And Method For Shadow Creation And Improved Depth Perception And Edge Detection
PCT/US2015/016632 WO2015127090A1 (fr) 2014-02-20 2015-02-19 Système d'éclairage pour endoscope et procédé de création d'ombre et perception améliorée de la profondeur et de détection améliorée des contours

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EP (1) EP3107440B1 (fr)
AU (1) AU2015218950B2 (fr)
CA (1) CA2940120C (fr)
ES (1) ES2912287T3 (fr)
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WO2020220035A1 (fr) 2019-04-26 2020-10-29 Chemimage Corporation Produit d'imagerie hybride et système endoscopique hybride
US11022740B2 (en) * 2017-09-11 2021-06-01 Olympus Corporation Illumination unit for endoscope and endoscope
US11122968B2 (en) 2019-06-20 2021-09-21 Cilag Gmbh International Optical fiber waveguide in an endoscopic system for hyperspectral imaging
US11213194B2 (en) * 2019-06-20 2022-01-04 Cilag Gmbh International Optical fiber waveguide in an endoscopic system for hyperspectral, fluorescence, and laser mapping imaging
US11583173B2 (en) * 2017-06-20 2023-02-21 Olympus Corporation Light source apparatus, endoscope system, and illumination control method for adjusting first and second illumination light emitted from first and second illumination light emission ends of a light guide
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US11583173B2 (en) * 2017-06-20 2023-02-21 Olympus Corporation Light source apparatus, endoscope system, and illumination control method for adjusting first and second illumination light emitted from first and second illumination light emission ends of a light guide
US11022740B2 (en) * 2017-09-11 2021-06-01 Olympus Corporation Illumination unit for endoscope and endoscope
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EP3107440A1 (fr) 2016-12-28
AU2015218950B2 (en) 2017-06-15
ES2912287T3 (es) 2022-05-25
WO2015127090A1 (fr) 2015-08-27
CA2940120A1 (fr) 2015-08-27
MX378369B (es) 2025-03-10
AU2015218950A1 (en) 2016-09-08
CA2940120C (fr) 2019-05-14
EP3107440A4 (fr) 2017-12-20
EP3107440B1 (fr) 2022-04-06
MX2016010831A (es) 2017-03-31

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